Authentic Steel manufactures regular and big spangle GI coils featuring classic zinc crystal patterns. Designed for general construction, ventilation ductwork, and outdoor enclosures, our regular spangle galvanized steel coils offer cost-effective corrosion protection and proven durability.
Regular and big spangle GI coils remain the globally preferred choice for general commercial construction, HVAC ducting, and agricultural enclosure systems. Authentic Steel produces high-quality spangled galvanized steel coils featuring clear, distinct zinc crystal patterns that provide a classic metallic aesthetic along with economical corrosion protection.
The distinctive spangle pattern forms naturally as zinc crystallizes on the steel substrate during cooling. By regulating chemical bath composition and cooling line speeds, our mill produces consistent spangle geometry across the entire coil surface. These versatile coils are widely converted into HVAC spiral ducts, cable management trays, perimeter fencing, and standard corrugated roofing sheets.
| Parameter | Specification |
| Spangle Pattern | Regular Spangle / Big Spangle |
| Thickness | 0.15mm - 3.5mm |
| Width | 870mm - 1250mm |
| Zinc Coating | 40g/m² - 275g/m² |
| Surface Treatment | Chromated / Oiled / Dry |
| Material Grade | SGCC, DX51D+Z, ASTM A653 |
| Coil Weight | 3 - 15 MT |
Beyond visual appeal, regular spangle galvanized steel coils deliver dependable atmospheric corrosion protection. The dense zinc-iron alloy layers function as an effective barrier against humidity, rain, and environmental oxidizers. Authentic Steel applies chromate passivation, light anti-rust oiling, or dry surface treatments to shield master coils against wet storage stain and white rust during transit.
Our manufacturing facilities handle a broad spectrum of thickness gauges and coil widths, allowing us to package coils tailored to match your specific uncoiling, slitting, or shearing equipment. Each coil is wound under strict tension control to maintain neat sidewalls, preventing telescoping or coil collapse during transportation. Positioned near Tianjin Port, Authentic Steel coordinates quick ocean dispatch and competitive freight options to all global markets. Contact our sales team today for immediate pricing and material specifications on regular and big spangle GI coils.
Contact Information
Email: bella@authsteel.com / bella@wanlusteel.com
Mobile/Tel/WhatsApp: +86 189 2041 0870
